{
  "bibcode": "2013GCN.15633....1D",
  "body": "M. De Pasquale (UCL-MSSL) and M. J. Page (UCL-MSSL)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB131229A\n159 s after the BAT trigger (Page et al., GCN Circ. 15627).\nNo optical afterglow consistent with the XRT enhanced position\n(Evans et al. GCN Circ. 15631) is detected in the initial UVOT exposures.\nPreliminary 3-sigma upper limits using the UVOT photometric system\n(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first\nfinding chart (FC) exposure and subsequent exposures are:\n\nFilter         T_start(s)   T_stop(s)      Exp(s)         Mag\n\nu_FC               159          408          246         >19.9\nu                  159         6481          639         >20.4\nv                 4434        18141         1889         >20.6\nb                 4023        16459         2164         >21.6\nw1                4844         6275          393         >19.8\nw2                4230        17366         1279         >20.5\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.29 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 15633,
  "createdOn": 1388341089000,
  "email": "m.depasquale@ucl.ac.uk",
  "subject": "GRB 131229A: Swift/UVOT Upper Limits",
  "submitter": "Massimiliano de Pasquale at MSSL-UCL  <m.depasquale@ucl.ac.uk>",
  "eventId": "GRB 131229A"
}